Github user karensmolermiller commented on a diff in the pull request:
https://github.com/apache/geode/pull/407#discussion_r103267882
--- Diff: README.md ---
@@ -1,102 +1,191 @@
[<img src="https://geode.apache.org/img/apache_geode_logo.png";
align="center"/>](http://geode.apache.org)
-[](https://travis-ci.org/apache/geode)
[](https://www.apache.org/licenses/LICENSE-2.0)
[](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.apache.geode%22)
+[](https://travis-ci.org/apache/geode)
[](https://www.apache.org/licenses/LICENSE-2.0)
[](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.apache.geode%22)
[](http://brewformulas.org/ApacheGeode)
[](https://hub.docker.com/r/apachegeode/geode/)
+
## Contents
-1. [Overview](#overview)
+1. [Overview](#overview)
+2. [How to Get Apache Geode](#obtaining)
2. [Main Concepts and Components](#concepts)
3. [Location of Directions for Building from Source](#building)
4. [Geode in 5 minutes](#started)
5. [Application Development](#development)
6. [Documentation](http://geode.apache.org/docs/)
7. [Wiki](https://cwiki.apache.org/confluence/display/GEODE/Index)
-
-## <a name="overview"></a>Overview
-[Apache Geode](http://geode.apache.org/) is a data management platform
that provides real-time, consistent access to data-intensive applications
throughout widely distributed cloud architectures.
-Apache Geode pools memory, CPU, network resources, and optionally local
disk across multiple processes to manage application objects and behavior. It
uses dynamic replication and data partitioning techniques to implement high
availability, improved performance, scalability, and fault tolerance. In
addition to being a distributed data container, Apache Geode is an in-memory
data management system that provides reliable asynchronous event notifications
and guaranteed message delivery.
+## <a name="overview"></a>Overview
-Apache Geode is a mature, robust technology originally developed by
GemStone Systems in Beaverton, Oregon. Commercially available as GemFireâ¢,
the technology was first deployed in the financial sector as the transactional,
low-latency data engine used in Wall Street trading platforms. Today Apache
Geode is used by over 600 enterprise customers for high-scale business
applications that must meet low latency and 24x7 availability requirements. An
example deployment includes [China National
Railways](http://pivotal.io/big-data/case-study/scaling-online-sales-for-the-largest-railway-in-the-world-china-railway-corporation)
that uses Geode to run railway ticketing for the entire country of China with
a 10 node cluster that manages 2 terabytes of "hot data" in memory, and 10
backup nodes for high availability and elastic scale.
+[Apache Geode](http://geode.apache.org/) is
+a data management platform that provides real-time, consistent access to
+data-intensive applications throughout widely distributed cloud
architectures.
+
+Apache Geode pools memory, CPU, network resources, and optionally local
disk
+across multiple processes to manage application objects and behavior. It
uses
+dynamic replication and data partitioning techniques to implement high
+availability, improved performance, scalability, and fault tolerance. In
+addition to being a distributed data container, Apache Geode is an
in-memory
+data management system that provides reliable asynchronous event
notifications
+and guaranteed message delivery.
+
+Apache Geode is a mature, robust technology originally developed by
GemStone
+Systems. Commercially available as GemFireâ¢, it was first deployed in the
+financial sector as the transactional, low-latency data engine used in Wall
+Street trading platforms. Today Apache Geode technology is used by
hundreds of
+enterprise customers for high-scale business applications that must meet
low
+latency and 24x7 availability requirements.
+
+## <a name="obtaining"></a>How to Get Apache Geode
+
+You can download Apache Geode from the
+[website](http://geode.apache.org/releases/), run a Docker
+[image](https://hub.docker.com/r/apachegeode/geode/), or install with
+[homebrew](http://brewformulas.org/ApacheGeode) on OSX. Application
developers
+can load dependencies from [Maven
+Central](https://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.apache.geode%22).
+
+Maven
+```
+<dependencies>
+ <dependency>
+ <groupId>org.apache.geode</groupId>
+ <artifactId>geode-core</artifactId>
+ <version>$VERSION</version>
+ </dependency>
+</dependencies>
+```
+
+Gradle
+```
+dependencies {
+ compile "org.apache.geode:geode-core:$VERSION"
+}
+```
## <a name="concepts"></a>Main Concepts and Components
-_Caches_ are an abstraction that describe a node in an Apache Geode
distributed system.
+_Caches_ are an abstraction that describe a node in an Apache Geode
distributed
+system.
-Within each cache, you define data _regions_. Data regions are analogous
to tables in a relational database and manage data in a distributed fashion as
name/value pairs. A _replicated_ region stores identical copies of the data on
each cache member of a distributed system. A _partitioned_ region spreads the
data among cache members. After the system is configured, client applications
can access the distributed data in regions without knowledge of the underlying
system architecture. You can define listeners to receive notifications when
data has changed, and you can define expiration criteria to delete obsolete
data in a region.
+Within each cache, you define data _regions_. Data regions are analogous to
+tables in a relational database and manage data in a distributed fashion as
+name/value pairs. A _replicated_ region stores identical copies of the
data on
+each cache member of a distributed system. A _partitioned_ region spreads
the
+data among cache members. After the system is configured, client
applications
+can access the distributed data in regions without knowledge of the
underlying
+system architecture. You can define listeners to receive notifications when
+data has changed, and you can define expiration criteria to delete obsolete
+data in a region.
-_Locators_ provide clients with both discovery and server load balancing
services. Clients are configured with locator information, and the locators
maintain a dynamic list of member servers. The locators provide clients with
connection information to a server.
+_Locators_ provide clients with both discovery and server load balancing
+services. Clients are configured with locator information, and the locators
+maintain a dynamic list of member servers. The locators provide clients
with
+connection information to a server.
Apache Geode includes the following features:
-* Combines redundancy, replication, and a "shared nothing" persistence
architecture to deliver fail-safe reliability and performance.
-* Horizontally scalable to thousands of cache members, with multiple cache
topologies to meet different enterprise needs. The cache can be distributed
across multiple computers.
+* Combines redundancy, replication, and a "shared nothing" persistence
+ architecture to deliver fail-safe reliability and performance.
+* Horizontally scalable to thousands of cache members, with multiple cache
+ topologies to meet different enterprise needs. The cache can be
+ distributed across multiple computers.
* Asynchronous and synchronous cache update propagation.
-* Delta propagation distributes only the difference between old and new
versions of an object (delta) instead of the entire object, resulting in
significant distribution cost savings.
-* Reliable asynchronous event notifications and guaranteed message
delivery through optimized, low latency distribution layer.
-* Applications run 4 to 40 times faster with no additional hardware.
-* Data awareness and real-time business intelligence. If data changes as
you retrieve it, you see the changes immediately.
-* Integration with Spring Framework to speed and simplify the development
of scalable, transactional enterprise applications.
+* Delta propagation distributes only the difference between old and new
+ versions of an object (delta) instead of the entire object, resulting in
+ significant distribution cost savings.
+* Reliable asynchronous event notifications and guaranteed message delivery
+ through optimized, low latency distribution layer.
+* Data awareness and real-time business intelligence. If data changes as
+ you retrieve it, you see the changes immediately.
+* Integration with Spring Framework to speed and simplify the development
+ of scalable, transactional enterprise applications.
* JTA compliant transaction support.
-* Cluster-wide configurations that can be persisted and exported to other
clusters.
+* Cluster-wide configurations that can be persisted and exported to other
+ clusters.
* Remote cluster management through HTTP.
* REST APIs for REST-enabled application development.
-* Rolling upgrades may be possible, but they will be subject to any
limitations imposed by new features.
+* Rolling upgrades may be possible, but they will be subject to any
+ limitations imposed by new features.
## <a name="building"></a>Building this Release from Source
-Directions to build Apache Geode from source are in the source
distribution, file `BUILDING.md`.
+See
[BUILDING.md](https://github.com/apache/geode/blob/develop/BUILDING.md) for
+instructions on how to build the project.
## <a name="started"></a>Geode in 5 minutes
-With a JDK version 1.8 or a more recent version installed,
+Geode requires installation of JDK version 1.8. After installing Apache
Geode,
start a locator and server:
$ gfsh
- gfsh> start locator --name=locator
- gfsh> start server --name=server
+ gfsh> start locator
+ gfsh> start server
Create a region:
- gfsh> create region --name=region --type=REPLICATE
+ gfsh> create region --name=hello --type=REPLICATE
+
+Write a client application (this example uses a
[Gradle](https://gradle.org)
+build script):
-Write a client application:
+_build.gradle_
+
+ apply plugin: 'java'
+ apply plugin: 'application'
+
+ mainClassName = 'HelloWorld'
+
+ repositories { mavenCentral() }
+ dependencies {
+ compile 'org.apache.geode:geode-core:1.1.0'
+ runtime 'org.slf4j:slf4j-log4j12:1.7.24'
+ }
-_HelloWorld.java_
+_src/main/java/HelloWorld.java_
import java.util.Map;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.client.*;
-
+
public class HelloWorld {
public static void main(String[] args) throws Exception {
ClientCache cache = new ClientCacheFactory()
.addPoolLocator("localhost", 10334)
.create();
Region<String, String> region = cache
.<String,
String>createClientRegionFactory(ClientRegionShortcut.CACHING_PROXY)
- .create("region");
-
+ .create("hello");
+
region.put("1", "Hello");
region.put("2", "World");
-
+
for (Map.Entry<String, String> entry : region.entrySet()) {
System.out.format("key = %s, value = %s\n", entry.getKey(),
entry.getValue());
}
cache.close();
}
}
-Compile and run `HelloWorld.java`. The classpath should include
`geode-dependencies.jar`.
+Build and run the `HelloWorld` example:
+
+ $ gradle run
- javac -cp
/some/path/geode/geode-assembly/build/install/apache-geode/lib/geode-dependencies.jar
HelloWorld.java
- java -cp
.:/some/path/geode/geode-assembly/build/install/apache-geode/lib/geode-dependencies.jar
HelloWorld
+The application will connect to the running cluster, create a local cache,
put
+some data in the cache, and print the cached data to the console:
+
+ key = 1, value = Hello
+ key = 2, value = World
+
+For more information see the [Geode
+Examples](https://github.com/apache/geode-examples) repository or the
+[documentation](http://geode.apache.org/docs/).
--- End diff --
Please include a
gfsh shutdown --include-locators=true
command. Otherwise new users won't realize that they still have a locator
and server running. Makes it especially confusing if they start further
locators and servers, since leaving out the --name option (in the gfsh start
commands) won't cause a complaint.
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